update:

car breaks up at 6500 in 2nd, about 7000 in 3rd and usually not at all in 4th now. base fp is 40. pushing 20psi on 94 octane with egt's getting into the low 800's.

car is pulling almost as hard on 20 psi as it did last year with the fp3055 at 28 psi. my guess is it would run mid-high 11's on 20psi... but still can't rev to where i need to.

 

Almost every time i've come across the problem your describing the culprit has been the plug wires. I'm not sure exactly why it is, but my car seems to go thru a set a year, and is already on it's second set this year. I replaced them in April, and in July i started to get misfires again. #1 was all fried and the metal connector broke into pieces when i pulled it out of the coil, and # 3 coil connector was all fried looking as well. I use the Bosch wires from autozone because they have an unlimited lifetime warranty, and i get a new set for free everytime they go to hell. You could measure the resistance of your plug wires for the heck of it,and/or replace them if they are a bit old. Also, try to keep wires 4&1 from touching wires 2&3, but it's ok for 4 to touch 1 or 2 to touch 3.

What is an Ignition Solutions plasma booster? Also, what was your ipw on the 30 psi and 20 psi runs?

but then the high egt's no-matter-what make me think...the ignition timing might be retarded and the exhaust valves are opening as the ignition is taking place, hence all the heat in the manifold.

Remember, when you misfire the fuel may not get ignited until it hits the red hot exhaust manifold, and you have an instant blowtorch on the egt probe. Do your o2 readings have lean spikes when the breaking up occurs as well? This occurs from the o2 sensor reading all the unburned o2 from the misfire. If you have these symptoms, i would say your problem is most likely spark related.

 

when it breaks up boost will climb to 33-35 sometimes.

Fuel exploding in the manifold/turbine housing could also cause this, similar to antilag.

Also, you may want to try a set of BR7ES plugs gapped @.28 instead of BP7ES. I've read it's a good idea to keep the resistor, and switching to a non-projected plug moves the spark "up" in the chamber slightly to help prevent it from being blown out. At 30+ psi BR8ES's might not be a bad idea.

 

I concur with the use of BR8ES plugs and a new set of wires. I would tighten the gap a little more to .026 and see how it fairs. He :scholar: pretty much has it covered.

 

redawdturbo:
Plasma Booster

I probably shouldn't say this, but it's the same booster Curt Brown ran...Just one of his secrets. basically a not-so-well-known HKS TwinPower amplifier.
i haven't logged pulse widths. will do that though. and yes, the o2 curve has low spikes during the break-ups. down to around .60 sometimes.

and i have been considering the br8es plugs since the runs this past week. i'm glad somone else is confirming the idea. the wires only have 2100 miles on them (1900 last year and 200 this year). but nonetheless i'm going to check them today.

thanks for the input guys. let me know if you think of anything else. and i'll get more complete logs and updates on the wires and plugs a.s.a.p.

 

well regarding your breaking up, ive had the same problem a couple times with mycar. I came out to be bad plug wires(insulation was jus shot, and a bad coil.

How to test - when the car is runnin, pop the hood and take each wire induvidually and remove it from the plug. be careful not to shock your self. but when you disconnect the wire from the plug, look at the same wire connected to the coil and see if there is any arching going on, and that should tell you what is going on. if the insulation on the wires is bad i recommend magnacor wires, but if you dont have the money at the time just wrap them tightly with electrical tape and that will fix the problem till you buy new wires. hope things work out Pz!